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Oracle Database 12c Release 2 Multitenant by Franck Pachot, Vit Špinka, Anton Els

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CHAPTER

1

Introduction to Multitenant

With Oracle Database 12c, Oracle introduced a major change to its database architecture. Before Oracle Database 12c, an instance could open only one database. If you had multiple databases, you would need to start multiple instances, because they were totally isolated structures, even when hosted on the same server. This differs from most other RDBMSs, where a single system can manage multiple databases.

With the release of Oracle Database 12c, one instance can open multiple pluggable databases or PDBs. Oracle has signaled that the new multitenant architecture is here to stay, with the deprecation of the old ...

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